Build an ldns_dnssec_data_chain, which contains all
DNSSEC data that is needed to derive the trust tree later

The data_set will be cloned

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*res: resolver structure for further needed queries
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qflags: resolution flags
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*data_set: The original rrset where the chain ends
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*pkt: optional, can contain the original packet
(and hence the sigs and maybe the key)
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*orig_rr: The original Resource Record

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Returns the DNSSEC data chain

ldns_dnssec_data_chain_print()

Prints the dnssec_data_chain to the given file stream

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*out: The file stream to print to
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*chain: The dnssec_data_chain to print

AUTHOR

The ldns team at NLnet Labs. Which consists out of
Jelte Jansen and Miek Gieben.